<!--
 * @Descripttion: 资源文件选择器
 * @version: 1.0
 * @Author: sakuya
 * @Date: 2021年10月11日16:01:40
 * @LastEditors:
 * @LastEditTime:
-->

<template>
	<div class="sc-file-select">
		<div class="sc-file-select__side" v-loading="menuLoading || uploading===true">
			<div class="sc-file-select__side-menu">
				<el-tree ref="group" class="menu" node-key="id" :data="group" :current-node-key="''" :props="treeProps"
						 :highlight-current="true" :expand-on-click-node="false" default-expand-all @node-click="groupClick"
						 >
					<template #default="{ node,data }">
						<span class="custom-tree-node el-tree-node__label">
							<span><el-icon class="icon"><el-icon-folder/></el-icon>{{node.label}}</span>
							<span class="do">
								<el-icon @click.stop="showCatePop('add',node, data)"><el-icon-plus/></el-icon>
								<el-icon @click.stop="showCatePop('edit',node, data)" v-if="data.id !== rootCategory.id"><el-icon-edit/></el-icon>
								<el-icon @click.stop="delCate(node, data)" v-if="data.id !== rootCategory.id"><el-icon-delete/></el-icon>
							</span>
						</span>
					</template>
				</el-tree>
			</div>
			<div class="sc-file-select__side-msg" v-if="multiple">
				已选择 <b>{{value.length}}</b> / <b>{{max}}</b> 项
			</div>
		</div>
		<div class="sc-file-select__files" v-loading="listLoading">
			<div class="sc-file-select__top">
				<div class="upload" v-if="!hideUpload && mode === 1">
					<el-upload class="sc-file-select__upload" :disabled="group.length < 1" v-if="!uploading" action="" multiple :show-file-list="false"
							   :accept="accept" :on-change="uploadChange" :auto-upload="false">
						<el-button type="primary" icon="el-icon-upload" :disabled="group.length < 1">本地上传</el-button>
					</el-upload>
					<el-upload v-else class="sc-file-select__upload" disabled :auto-upload="false">
						<el-button type="primary" icon="el-icon-upload" disabled>上传中...</el-button>
					</el-upload>
					<span class="tips" v-if="group.length > 0"><el-icon><el-icon-warning/></el-icon>大小不超过{{maxSize}}MB</span>
					<span class="tips" v-else style="color: #F00;"><el-icon><el-icon-error/></el-icon>获取目录失败，请联系管理员</span>
				</div>
				<div class="operationMode" v-if="mode === 1">
					<el-button style="margin-left: 5px;" @click="modeChange" :disabled="data.length<=0 || uploading===true">批量操作</el-button>
				</div>
				<div class="operationMode2" v-if="mode === 2">
					管理文件：
					<el-button type="danger" :disabled="value.length<=0" @click="operationMode('del')">删 除</el-button>
					<el-button type="warning" :disabled="value.length<=0" @click="operationMode('move')">移 动</el-button>
					<el-button @click="modeChange">返回</el-button>
				</div>
				<div class="keyword">
					<el-input v-model="keyword" prefix-icon="el-icon-search" placeholder="文件名搜索" clearable
							  @keyup.enter="search" @clear="search"></el-input>
				</div>
			</div>
			<div class="sc-file-select__list">
				<el-scrollbar ref="scrollbar">
					<el-empty v-if="fileList.length===0 && data.length===0" description="无数据" :image-size="80"></el-empty>
					<div v-for="(file, index) in fileList" :key="index" class="sc-file-select__item">
						<div class="sc-file-select__item__file">
							<div class="sc-file-select__item__upload" v-if="!file.error">
								<el-progress type="circle" :percentage="file.progress" :width="70"></el-progress>
							</div>
							<div v-if="file.error" style="display: flex;align-items: center;justify-content: center;height: 100%;color: #F00;font-size:36px;">
								<el-tooltip
									:content="file.error"
									placement="top"
								>
								<el-icon>
									<el-icon-warning-filled />
								</el-icon>
								</el-tooltip>
							</div>
							<div v-else style="height: 100%;">
								<el-image :src="file.tempImg" fit="contain" v-if="_isImg(file.name)"></el-image>
								<div v-else style="display:flex;align-items:center;justify-content: center;height:100%;font-size:36px;">
									<el-icon>
										<el-icon-document />
									</el-icon>
								</div>
							</div>
						</div>
						<p>{{file.name}}</p>
					</div>
					<div v-for="item in data" :key="item[fileProps.key]" class="sc-file-select__item"
						 :class="{active: value.includes(item[fileProps.url]) }" @click="select(item)">
						<div class="sc-file-select__item__file">
							<div class="sc-file-select__item__checkbox" v-if="multiple || mode === 2">
								<el-icon>
									<el-icon-check/>
								</el-icon>
							</div>
							<div class="sc-file-select__item__select" v-else>
								<el-icon>
									<el-icon-check/>
								</el-icon>
							</div>
							<div class="sc-file-select__item__box"></div>
							<el-image v-if="_isImg(item[fileProps.url])" :src="showImage(item)" fit="contain" lazy></el-image>
							<div v-else class="item-file item-file-doc">
								<el-icon>
									<component :is="item.icon || 'sc-icon-doctype-unknown'"/>
								</el-icon>
							</div>
						</div>
						<p :title="item[fileProps.fileName]">{{item[fileProps.fileName]}}</p>
					</div>
				</el-scrollbar>
			</div>
			<div class="sc-file-select__pagination">
				<el-pagination small background layout="prev, pager, next" :total="total" :page-size="pageSize"
							   v-model:currentPage="currentPage" @current-change="reload"></el-pagination>
			</div>
			<div class="sc-file-select__do">
				<slot name="do"></slot>
				<el-button type="primary" :disabled="value.length<=0 || mode === 2" @click="submit">确 定</el-button>
			</div>
		</div>
	</div>
	<el-dialog :title="catePopTitle" v-model="catePopVisible" width="30%" destroy-on-close @close="catePopClose">
		<el-form :model="cateForm" ref="dialogForm" label-width="80px"
				 label-position="left">
			<el-form-item label="上级目录" prop="avatar">
				<el-cascader clearable style="width: 100%;"
							 v-model="cateForm.parent_id"
							 :options="group"
							 :props="{
								value: 'id',
								emitPath:true,
								checkStrictly:true,
								label: 'group_name'
							 }"
				></el-cascader>
			</el-form-item>
			<el-form-item label="目录名" prop="avatar">
				<el-input v-model="cateForm.name" placeholder="请输入目录名" clearable></el-input>
			</el-form-item>
		</el-form>
		<template #footer>
			<el-button @click="catePopVisible=false">取 消</el-button>
			<el-button type="primary" @click="catePopSubmit()">保 存
			</el-button>
		</template>
	</el-dialog>
	<el-dialog title="请选择新的目录" v-model="operationPopVisible" width="30%" destroy-on-close :close-on-click-modal="false"
			   :close-on-press-escape="false">
		<el-form label-width="80px" label-position="left" v-loading="operationPopLoading">
			<el-form-item label="目录" prop="avatar">
				<el-cascader clearable style="width: 100%;"
							 v-model="newCategoryId"
							 :options="group"
							 :props="{
								value: 'id',
								emitPath:true,
								checkStrictly:true,
								label: 'group_name'
							 }"
				></el-cascader>
			</el-form-item>
		</el-form>
		<template #footer>
			<el-button @click="operationPopVisible=false">取 消</el-button>
			<el-button type="primary" @click="coperationPopSubmit()" :loading="operationPopLoading">移 动
			</el-button>
		</template>
	</el-dialog>
</template>

<script>
import config from "@/config/fileSelect"
import {ElMessageBox} from "element-plus";
import { uploadFile } from '@/utils/chunkUpload';

export default {
	props: {
		modelValue: null,
		// fileType:1,//1是全部 2是仅图片 3是音频 4是视频 5文件
		fileType: {type: Number, default: 1},
		hideUpload: {type: Boolean, default: false},
		multiple: {type: Boolean, default: false},
		max: {type: Number, default: config.max},
		onlyImage: {type: Boolean, default: false},
		maxSize: {type: Number, default: config.maxSize},
	},
	data() {
		return {
			mode: 1,
			cateForm: {
				id: '',
				name: '',
				parent_id: ''
			},
			catePopVisible: false,
			catePopMode: '',
			catePopTitles: {
				'add':'新增',
				'edit':'编辑',
			},
			showGrouploading: false,
			operationPopVisible: false,
			rootCategory: {},
			newCategoryId: [],
			groupFilterText: '',
			group: [],
			keyword: '',
			pageSize: 20,
			total: 0,
			currentPage: 1,
			data: [],
			menu: [],
			menuId: '',
			acceptList: [
				{type: 1, accept: ''},
				{type: 2, accept: 'image/gif, image/jpeg, image/png'},
				{type: 3, accept: 'audio/*'},
				{type: 4, accept: 'video/*'},
				{type: 5, accept: '.pdf, .doc, .docx, .xls, .xlsx'},
			],
			// value: this.multiple ? [] : '',
			value: [],
			fileList: [],
			accept: '',
			// accept: this.onlyImage ? "image/gif, image/jpeg, image/png" : "",
			listLoading: false,
			menuLoading: false,
			treeProps: config.menuProps,
			fileProps: config.fileProps,
			files: config.files,
			returnData: [], // 返回的数据，items 整个数据返回，外部组件自行处理
			multipleDefault: false,
			operationPopLoading: false,
			uploading: false,
		}
	},
	watch: {
		multiple() {
			this.value = []
			this.$emit('update:modelValue', JSON.parse(JSON.stringify(this.value)));
		}
	},

	mounted() {
		// this.getMenu()
		this.getData()
		this.getGroup()
		this.multipleDefault = this.multiple;
	},
	computed: {
		catePopTitle(){
			return this.catePopTitles[this.catePopMode] + '目录';
		}
	},
	methods: {
		showCatePop(type,node,data) {
			this.catePopMode = type;
			console.log(type,node,data)
			if ('edit' === type) {
				this.cateForm.id = data.id;
				this.cateForm.name = data.group_name;
				this.cateForm.parent_id = data.parent_id;
			}
			if ('add' === type) {
				this.cateForm.parent_id = data.id;
			}
			this.catePopVisible = true;
		},
		catePopClose() {
			this.cateForm.name = '';
			this.cateForm.parent_id = this.rootCategory.id;
		},
		async delCate(node, data) {
			const that = this;
			ElMessageBox.confirm('确认删除《'+data.group_name+'》目录吗？','提醒').then(async () => {
				console.log('删除',data)
				var res = await this.$API.gdshop.attachmentGroup.delete({ids:data.id});
				this.showResMessage(res,function () {
					that.catePopVisible = false;
					that.getGroup();
				},'删除成功')
			})
		},
		showResMessage(res,successFun = () => {},successMsg = '') {
			if (res.code === 0) {
				if (!successMsg) {
					successMsg = res.message;
				}
				this.$message.success(successMsg);
				if (this.$TOOL.isFunction(successFun)) {
					successFun(res);
				}
			}
			else {
				this.$message.error(res.message ?? '未知错误')
			}
		},
		getAccept() {
			this.accept = this.acceptList.filter(f => f.type == this.fileType)[0].accept;
		},
		async getGroup() {
			this.showGrouploading = true;
			var res = await this.$API.gdshop.attachmentGroup.list();
			this.showGrouploading = false;
			let newDatas = res.data;
			newDatas.unshift({id: 0, group_name: '全部'});
			console.log('newDatas',newDatas)
			this.group = this.$TOOL.deepTree(newDatas, 'parent_id');
			/*this.group = res.data.map(item => {
				// item.parent_id = '0';
				return item;
			});*/
			if (this.group.length > 0) {
				this.rootCategory = this.group[0];
			}
			this.getAccept();

		},
		//获取目录数据
		async getMenu() {
			this.menuLoading = true
			var res = await config.menuApiObj.list()
			this.menu = res.data
			this.menuLoading = false
		},
		//获取列表数据
		async getData() {
			this.listLoading = true
			var reqData = {
				[config.request.menuKey]: this.menuId,
				[config.request.page]: this.currentPage,
				[config.request.pageSize]: this.pageSize,
				[config.request.keyword]: this.keyword
			}
			if (this.onlyImage) {
				reqData.type = 'image'
			}
			if (reqData[config.request.menuKey] === "0"){
				reqData[config.request.menuKey] = ""
			}
			var res = await config.listApiObj.page(reqData)
			var parseData = config.listParseData(res)
			console.log(parseData);
			this.data = parseData.rows
			this.total = parseData.total
			this.listLoading = false
			this.$refs.scrollbar.setScrollTop(0)
		},
		//树点击事件
		groupClick(data) {
			this.menuId = data.id
			this.currentPage = 1
			this.keyword = null
			// 点击树后，清空上传失败的文件
			this.fileList.length = 0
			this.getData()
		},
		//分页刷新表格
		reload() {
			this.getData()
		},
		search() {
			this.currentPage = 1
			this.getData()
		},
		select(item) {
			const itemUrl = item[this.fileProps.url]
			if (this.multipleDefault) {
				if (this.value.includes(itemUrl)) {
					this.value.splice(this.value.findIndex(f => f == itemUrl), 1)
					this.returnData = this.returnData.filter(r => {
						return r[this.fileProps.url] !== itemUrl
					})
				} else {
					this.value.push(itemUrl)
					this.returnData.push(item)
				}
			} else {
				if (this.value.includes(itemUrl)) {
					this.value = []
					this.returnData = []
				} else {
					this.value = [itemUrl]
					this.returnData = [item]
				}
			}
		},
		async catePopSubmit() {
			if (Array.isArray(this.cateForm.parent_id)) {
				this.cateForm.parent_id = this.cateForm.parent_id[this.cateForm.parent_id.length - 1];
			}
			let postData = {
				group_name: this.cateForm.name,
				parent_id: this.cateForm.parent_id
			}
			if (this.catePopMode === 'edit') {
				postData['id'] = this.cateForm.id;
			}
			console.log(postData);
			const successMsg = this.catePopMode === 'edit' ? '编辑成功' : '新增成功'
			let res;
			if (this.catePopMode === 'edit') {
				res = await this.$API.gdshop.attachmentGroup.update(postData)
			} else {
				res = await this.$API.gdshop.attachmentGroup.add(postData)
			}
			const that = this;
			this.showResMessage(res,function () {
				that.catePopVisible = false;
				that.getGroup();
			},successMsg)
		},
		//上传处理
		async uploadChange(file, fileList) {
			file.tempImg = URL.createObjectURL(file.raw);
			this.fileList = fileList

			const that = this
			setTimeout(()=>{
				that.kaishi()
			},500)
		},
		async kaishi(){
			if (this.uploading) {
				return
			}
			this.uploading = true
			const that = this
			const tmpFileList = this.fileList.concat()
			for (let i = 0; i < tmpFileList.length; i++) {
				const file = tmpFileList[i];
				const res = await uploadFile(file.raw,{
					onProgress: (e)=>{
						file.progress = e.jindu
					}
				})
				if (res.code !== 0) {
					if (res.code === 21001) {
						// 秒传成功
						file.progress = 100
						that.uploadSuccess(res, file.raw)
					} else {
						file.error = res.message;
						that.uploadError(res)
					}
				}
				else {
					file.progress = 100
					that.uploadSuccess(res, file.raw)
				}
			}
			this.uploading = false
		},
		async uploadBefore(file) {
			console.log('uploadBefore ',file)
			const maxSize = file.size / 1024 / 1024 < this.maxSize;
			if (!maxSize) {
				this.$message.warning(`上传文件大小不能超过 ${this.maxSize}MB!`);
				return false;
			}
		},
		uploadSuccess(res, file) {
			const successCodes = [
				0,
				21001,
			];
			console.log("uploadSuccess ",res);
			if (!res) {
				return false;
			}
			/*if (res.code === 21001) {
				this.$message.success('秒传完成');
			}*/
			if (!successCodes.includes(res.code)) {
				this.$message.error(res.message)
				file.error = res.message
				return false
			}
			this.fileList.splice(this.fileList.findIndex(f => f.uid == file.uid), 1)
			/*var response = config.uploadParseData(res);
			let tmp = {
				[this.fileProps.key]: response.id,
				[this.fileProps.fileName]: response.fileName,
				[this.fileProps.url]: response.url,
				[this.fileProps.baseUrl]: response.baseUrl,
			};*/
			this.data.unshift(res.data);
			/*if (!this.multiple) {
				this.value = response.url
			}*/
		},
		uploadError(err) {
			this.$notify.error({
				title: '上传文件错误',
				message: err
			})
		},
		//内置函数
		_isImg(fileUrl) {
			if (!fileUrl) {
				return '';
			}
			const imgExt = ['.jpg', '.jpeg', '.png', '.gif', '.bmp'];
			const fileExt = fileUrl.substring(fileUrl.lastIndexOf("."))
			return imgExt.indexOf(fileExt) != -1
		},
		_getExt(fileUrl) {
			if (!fileUrl) {
				return '';
			}
			return fileUrl.substring(fileUrl.lastIndexOf(".") + 1)
		},
		showImage(row) {
			return row[this.fileProps.baseUrl] + row[this.fileProps.url]
		},
		submit() {
			this.$emit('submit', this.returnData);
		},
		modeChange() {
			this.mode = this.mode === 1 ? 2 : 1;
			if (this.mode === 2) {
				// 编辑模式，打开多选
				this.multipleDefault = true;
			}
			if (this.mode === 1) {
				// 选择模式，恢复
				this.multipleDefault = this.multiple;
			}
			this.value.length = 0;
			this.returnData.length = 0
		},
		operationMode: async function (type) {
			console.log(type)
			const that = this
			if (type === 'del') {
				ElMessageBox.confirm('确认删除所选的文件吗？').then(async () => {
					that.listLoading = true
					let res = await that.$API.gdshop.attachment.delete({ids:that.returnData.map(item => item.id)})
					if (res.code === 0) {
						that.$message.success("删除成功")
					} else {
						that.$message.warning("删除失败")
					}
					that.getData()
				}).catch(() => {
				})
			}
			if (type === 'move') {
				that.operationPopVisible = true;
			}
		},
		async coperationPopSubmit() {
			this.operationPopLoading = true;
			let fileIds = this.returnData.map(item => {return item[this.fileProps.key]})
			const res = await this.$API.gdshop.attachment.move({ids:fileIds,group_id:this.newCategoryId[this.newCategoryId.length - 1]})
			this.operationPopLoading = false;
			if (res.code === 0) {
				this.returnData = []
				this.returnData.length = 0
				this.$message.success("移动成功")
				this.reload();
				this.operationPopVisible = false;
				return;
			}
			else {
				this.$message.error("移动失败")
			}
		}
	}
}
</script>

<style scoped>
.sc-file-select {
	display: flex;
}

.sc-file-select__files {
	flex: 1;
}

.sc-file-select__list {
	height: 500px;
}

.sc-file-select__item {
	display: inline-block;
	float: left;
	margin: 0 15px 25px 0;
	width: 110px;
	cursor: pointer;
}

.sc-file-select__item__file {
	width: 110px;
	height: 110px;
	position: relative;
}

.sc-file-select__item__file .el-image {
	width: 110px;
	height: 110px;
}

.sc-file-select__item__box {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	border: 2px solid var(--el-color-success);
	z-index: 1;
	display: none;
}

.sc-file-select__item__box::before {
	content: '';
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	background: var(--el-color-success);
	opacity: 0.2;
	display: none;
}

.sc-file-select__item:hover .sc-file-select__item__box {
	display: block;
}

.sc-file-select__item.active .sc-file-select__item__box {
	display: block;
}

.sc-file-select__item.active .sc-file-select__item__box::before {
	display: block;
}

.sc-file-select__item p {
	margin-top: 10px;
	white-space: nowrap;
	text-overflow: ellipsis;
	overflow: hidden;
	-webkit-text-overflow: ellipsis;
	text-align: center;
}

.sc-file-select__item__checkbox {
	position: absolute;
	width: 20px;
	height: 20px;
	top: 7px;
	right: 7px;
	z-index: 2;
	background: rgba(0, 0, 0, 0.2);
	border: 1px solid #fff;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
}

.sc-file-select__item__checkbox i {
	font-size: 14px;
	color: #fff;
	font-weight: bold;
	display: none;
}

.sc-file-select__item__select {
	position: absolute;
	width: 20px;
	height: 20px;
	top: 0px;
	right: 0px;
	z-index: 2;
	background: var(--el-color-success);
	display: none;
	flex-direction: column;
	align-items: center;
	justify-content: center;
}

.sc-file-select__item__select i {
	font-size: 14px;
	color: #fff;
	font-weight: bold;
}

.sc-file-select__item.active .sc-file-select__item__checkbox {
	background: var(--el-color-success);
}

.sc-file-select__item.active .sc-file-select__item__checkbox i {
	display: block;
}

.sc-file-select__item.active .sc-file-select__item__select {
	display: flex;
}

.sc-file-select__item__file .item-file {
	width: 110px;
	height: 110px;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
}

.sc-file-select__item__file .item-file i {
	font-size: 40px;
}

.sc-file-select__item__file .item-file.item-file-doc {
	color: #409eff;
}

.sc-file-select__item__upload {
	position: absolute;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	z-index: 1;
	background: rgba(255, 255, 255, 0.7);
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
}

.sc-file-select__side {
	width: 260px;
	margin-right: 15px;
	border-right: 1px solid rgba(128, 128, 128, 0.2);
	display: flex;
	flex-flow: column;
}

.sc-file-select__side-menu {
	flex: 1;
}

.sc-file-select__side-msg {
	height: 32px;
	line-height: 32px;
}

.sc-file-select__top {
	margin-bottom: 15px;
	display: flex;
	justify-content: space-between;
}

.sc-file-select__upload {
	display: inline-block;
}

.sc-file-select__top .tips {
	font-size: 12px;
	margin-left: 10px;
	color: #999;
}

.sc-file-select__top .tips i {
	font-size: 14px;
	margin-right: 5px;
	position: relative;
	bottom: -0.125em;
}

.sc-file-select__pagination {
	margin: 15px 0;
}

.sc-file-select__do {
	text-align: right;
}

.custom-tree-node {
	display: flex;
	flex: 1;
	align-items: center;
	justify-content: space-between;
	font-size: 14px;
	padding-right: 24px;
	height: 100%;
}

.custom-tree-node .label {
	display: flex;
	align-items: center;;
	height: 100%;
}

.custom-tree-node .do {display: none;}
.custom-tree-node .do i {margin-left: 10px;color: #999;}
.custom-tree-node .do i:hover {color: #333;}
.custom-tree-node:hover .do {display: inline-block;}
.footer {
	display: flex;
}
</style>
